Summary

Summary of Gallery and Slideshow plugins We only looked at two plugins in any detail. All the others were rejected for some reason or another.

Plugin name and description Plugin links Version, total downloads, last update, tested
WordPress Gallery Plugin – NextGEN Gallery
The most popular WordPress gallery plugin and one of the most popular plugins of all time with over 21 million downloads.
nextgen-gallery
home
3.0.1
21882463
2018-05-17 7:04pm GMT
4.9.7
Portfolio Slideshow
Add a clean, responsive JavaScript slideshow to your site.
portfolio-slideshow
home
1.12.1
405352
2018-04-21 4:28am GMT
4.9.7

The NextGEN gallery plugin appears to have the most Add-ons.